Head-motion for looms.



H. LE DOUX. HEAD MOTION FOR LOOMS. APPLICATION FILED MAY14. 1915.

Patented Dec. 14, 1915.

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HECTOR DOUX, OF WORCESTER, MASSACHUSETTS, ASfiIGNOR TO CROMPTON & KNOWLES LOOM WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

HEAD-MOTION FOR LOOIVIS.

ie-ties.

To all whom it may concern;

Be it known thatI, HECTOR Ln DoUx, a citizen of the United States, residing at Worcester, in the county of Worcester and a State of Massachusetts, have invented a new and useful Head-Motion for Looms, of which the following is a specification.

Thisinvention relates to a head motion for looms and particularly to certain in1- provements in a head motion of the well known Knowles type by which this head is betteradapted to the production of fabrics of the leno type. In the weaving of this type of fabric the so-called crossover harness is normally maintained in the lower shed at every pick but is necessarily raised to mid-position between successive picks whenever the crossing of the leno warp threads is changed. In some classes of goods it is desirable to bring the crossover harness to'mid-position at each beat of the lay in order to relieve the strain upon the leno warpthreads during the beating-up operation.

It is the object of my invention to provide improved and simplified mechanism for thus bringing the cross-overharness to mid-position and for thereafter permitting the harness to return to its normal or lower position.

My" invention further relates to certain devices, arrangements and combinations of parts" which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of my invention is shown in the drawings, in which,

Figure 1 is a side elevation of a head motion having my improvement embodied therein, certain of the parts being shown in section; Fig. 2 is a view similar to Fig. 1 but showing certain of the parts in a different position; Fig. 3 is a view similar to Figs. 1 and 2 but showing the parts in an intermediate position, and Figs. 4 and 5 are plan and sectional views respectively of a fancy leno fabric, for the weaving of which my invention is well adapted.

Referring to Fig. 1 I have shown my improved head motion mounted on a frame which in turn is supported upon the loom arch 11. The frame 10 carries the usual upper and lower cylinder gears 12 and 13 rotatable on fixed bearings and provide-ii with suitable driving connections (not Specification of Letters Patent.

Application filed May 14, 1915.

Patented Dec. 14, 1915.

Serial No. 28,181.

shown) through which they are continuously rotated in the directions indicated. A vibrator gear 1 1 for each harness jack 15 is rotatably mounted upon a vibrator lever 16 pivoted upon a fixed stud or shaft 17 and controlled in its vertical position by pattern rolls 18 carried by a pattern chain 19. The pattern chain may be actuated and controlled by any of the devices usually provided for this purpose. Each jack 15 is pivoted to the loom frame at 20 and is attached by a flexible connection 21 to a rocking plate 22 pivoted to the loom arch at The plate22 is also connected through a strap or other flexible member 241 to a harness 25 of the usual construction. The jack 15 is moved angularly in opposite directions about its pivot 20 by a. link 26 pivotally connected at one end to the jack 15 and rigidly secured to the loom arch 11. At its 'upper end the jack 30 is provided with a series of holes each adapted to receive a connection fromthe jack to a rocking plate 220 which in turn is connected through a strap 240 to the cross-over harness 250, these connections being substantially the same as the connections from the jack 15 to the harness 25. The downwardly extending arm of the auxiliary jack 30 is adjustably connected by a link 33 to the upwardly extending arm 31 of a bell crank lever 35 which is pivoted to the loom frame at 36. The horizontally extending arm 37 of the bell crank 35 is provided with a downwardly extend ing projection 38 positioned to engage a cam surface 39 formed upon the upper edge of the vibrator link 26. The projection 38 is held in engagement with the cam surface 39 bya' coil spring 10 encircling a rod 11 pivoted at its lower end to the arm 37 of the bell crank 35 and having its upper end guided through a projection 42 carried by the loom frame. The spring 40 is positioned between the arm 37 and the projection 42 and acts to force the arm yieldingly downwardly. The cam surface 39 is so formed that movement of the link 26 in either direction will raise the arm 37 of the bell crank 35, thus actuating the auxiliary jack 30 through the medium of the link 33 and raising the cross-over harness 250 to mid-position, as shown in Fig. 3. As the link 26 completes its movement in the same direction, the harness'250 is permitted to return to its normal lower position, such movement of the harness being accomplished by spring devices (not shown) connected to the lower portion of the harness. The angular movement of the rock plate 220 may be varied by changing the point of attachment of its connection to the auxiliary jack 30 or by'changing the point of connection of the link 33 to the arm 34.

WVhile I have shown the left hand endof the link 26 as supported and guided by the jack 15, it will be evident that this connection of the link and jack is not necessary for the operation of the auxiliary jack. If a separate vibrating gear and link is provided for actuating the auxiliary jack the left hand end of the link may be movably guided in any convenient manner and not necessarily as shown in the drawings. I

I In Figs. .4 and 5 I have illustrated one of the many types of fabrics for the weaving of which my improvements are adapted. In these figures the ordinary warp threads are indicated at WV, the leno warp threads at L and the filling or weft threads at F. The number of picks of filling inserted between each two crossings of the leno threads,

also the relative lateral arrangement of the leno threads with reference to the warp may of course be varied as desired.

Having thus described my invention it will be evident that changes and modifications can be made therein by'those skilled in the art without departing from the spirit and scope thereof as set forth in the claims and I .do not wish to be otherwise limited to the details herein disclosed, but

What I do claim is 1. In a head motion for looms, in combination, a pattern-controlled vibrator lever, an intermittently-movable vibrator gearcarried thereby, a link pivotally connected at one end to said gear and having itsopposite end movably supported, said link having a cam surface formed thereon, a lever engaged by said cam surface, an auxiliary harness jack, and connections from said lever to said jack. v

2. In a head motion for looms, .in combination, a pattern-controlled vibrator lever,

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an intermittently-movable vibrator gear carried thereby, a link pivotally connected at one end to said gear and having its opposite end movably supported, said link having a cam surface formed thereon, a lever. mounted on a fixed pivot and engaged by said cam surface, a spring to force said lever against said cam surface, an auxiliary jack, and connections from said lever to said auxiliary jack.

3. In a head motion for looms, inrcombination, a pattern-controlled vibrator lever,

an intermittently-movable vibrator gear carried thereby, an auxiliary harness jack, a cam movable with saidyibrator gear, con nections from said cam to said jack, whereby said cam is effective to move said jack p0sitively in one direction, and a spring 'connected to move said l ck yieldingly in the upon a fixed pivot, and connections between said lever and said auxiliary jacln said link having a cam surface formed thereon effective to actuate said lever and said auxiliary vibrator gear is partially rct'ated'in either direction. f v l 5. In a head motion for looms, in combination, a pattern-controlled vibrator-lever,

' an intermittently-movable vibrator gear carried thereby, a harness jack, a link connecting said jack to said vibrator gear, a; crossover harness, an auxiliary jack mounted upon a fixed pivot and connected vto said cross-over harness, an actuating lever also mounted upon a fixed pivot, connections between said lever and said auxiliary jack, said link having a cam surface formed thereon effective to move said auxiliary. jack and cross-over harness positively to mid'position whenever said vibrator gear is partially rotated in either direction, and 'ineans to vary the movement of the harness relatively to the movement of the actuating lever.

In'testimony whereof I have hereunto set my hand. i

nncron Ln 130px.

Washington, D. G.

jack toraise said cross-overcharness as said 

